From Stansted Airport train to Tottenham Hale Underground Station, Tube to London Euston, then train to Watford Junction. 1hrs 05min £34. From Stansted Airport, Coach Station (Stansted Aprt) bus to Harlow Town Centre, Bus Station (Harlow Bus Stn) then line 724 bus to Watford Junction Railway Station. 3hrs 09min £14. From London Stansted taxi to Watford. 49min £148. From London Stansted drive to Watford. 49min £9.